Question: When was the first performance of Lohengrin that had Karl Beck?
Paraphrase: Give me the date of the first performance Karl Beck had with Lohengrin?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q23085 p:P1191 ?s . ?s ps:P1191 ?obj . ?s pq:P161 wd:Q6371612 }